How many water violations are in Cochise County?

Cochise County has 19,234 total drinking water violations across 104 water systems, of which 1,180 are health-based violations. 100.0% of systems have at least one violation.

How many people get water from Cochise County systems?

Water systems in Cochise County serve approximately 129,689 people through 104 public water systems.

Has PFAS been detected in Cochise County water?

Under EPA UCMR5, 4 of 8 tested systems in Cochise County had at least one PFAS detection (50.0% of the UCMR5-tested subset - not of all 104 SDWIS systems).

What types of water sources supply Cochise County?

Water systems in Cochise County use GW (103 systems), SW (1 systems) as their primary water sources.

Are health-based violations serious?

Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 6.1% of Cochise County's violations are health-based. Among counties with any SDWIS violations, this extract puts Cochise County in the lower health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

Where does Cochise County sit among U.S. counties for water-system population?

According to EPA SDWIS county population served used on /counties, Cochise County ranks #483 of 3,254 counties by people served, and #8 of 15 counties in Arizona. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Arizona

Cochise County, Arizona

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet AZ003 · Cochise County 104 sys · 19,234 viol · #483/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-HIGH · SRC-GW · SYS-MID · BOOK-FULL

VIOL-SEVERE 100.0% flagged
HEALTH-LOW 6.1% health
RANK-TOP #483/3254
PHOTO-FINISH ±0.0 pp
PFAS-HIGH 50.0% detect
SRC-GW GW lead 99%
SYS-MID 104 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Navajo County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Cochise County ranks #483 of 3,254 counties by people served, and #8 of 15 counties in Arizona. See methodology · corpus placement.

Cochise County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 6.1% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 50.0% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #483 of 3,254 · #8 of 15 in Arizona.

Water Systems

System Name	Population	Violations	PFAS
Bella Vista City Water System	20,045	1,564	Detected
Douglas City Of	16,656	929	Clean
US Army Fort Huachuca	15,603	972	Detected
Pueblo del Sol Water Company	12,804	2,721	Clean
Arizona Water Co - Sierra Vista	9,175	85	Detected
Arizona Water Co - Bisbee	8,707	32	Detected
Benson, City of Water System	5,355	253	Clean
City of Willcox	3,236	220	Clean
Bisbee Douglas Intl Airport	2,600	172	-
Adot San Simon Rest Area	2,500	62	-
Bella Vista Water South	2,178	425	-
East Slope Water Company	1,980	255	-
Town of Huachuca City	1,750	220	-
Southland Utilities - Golden Acres	1,614	211	-
Southern Sunrise WC Cochise Horseshoe	1,588	272	-
Tombstone City Of	1,545	744	-
Mescal Lakes Water System	1,390	160	-
Clear Springs Utility Main	1,385	57	-
St David Dwid	1,255	79	-
Cochise County Community College Distric	1,120	200	-
Pomerene Dwid	1,030	337	-
Adot Texas Canyon Rest Area	1,006	36	-
Whetstone Dwid	940	105	-
Elfrida Wid	800	298	-
Apple Annies Orchard	675	46	-
Naco Water Co Main	658	106	-
East Slope Water - West	655	198	-
Southern Sunrise WC Miracle Valley	620	217	-
Northern Sunrise WC Coronado	553	160	-
Bowie Wid	489	133	-
Aspb Kartchner Caverns	483	139	-
Douglas Border Patrol Station	450	143	-
Coronado Elementary	446	99	-
Palominas Elementary	421	60	-
Cs Winchester Water Company	402	128	-
Cs Holiday Water Company	395	99	-
Sierra Vista Mh Village	328	118	-
Northern Sunrise WC Mustang Crystal	315	467	-
San Simon Dwid	312	745	-
Fiesta Canning Co Inc	300	129	-
Dragoon Water Company	283	374	-
Valley View Elementary	231	95	-
Mountain View RV Park	200	27	-
Fort Bowie National Historic Site	200	29	-
Chiricahua Natl Monument Bonita Cg	200	29	-
Willow Lakes Property Owners Assoc	190	261	-
Whetstone Ranch Water System	183	24	-
Adot San Simon Port of Entry	175	49	-
Western Refining Speedway 2962	162	10	-
Monte Vista Water Company	150	353	-

Compare beyond Arizona

Mid-flagged peers for Cochise County

Cross-state counties nearest Cochise County on flagged-system share (100.0%) and cumulative violation count (19,234). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.